Pianoforte- action



UNITED STATES PATENT OFFICE.

JAMES A. GRAY, OF ALBANY, NEV YORK.

PIANOFORTE-ACTION.

Speccaton of Letters Patent No. 16,832, dated March 17, 1857.

To all whom t may concern:

Be it known that I, JAMES A. GRAY, of Albany, in the county of Albanyand State ot' New York, have invented a new Improvement in the Action ofPianofortes; and I do hereby declare that the following is a `full andexact description.

The nature of my invention consists in the application of the spring Lin such manner as that one leg or end of the spring may rest on the jackfly A, and the other end or leg connected by an elastic band orconnection a, t0 the upper end of the ordinary hammer butt B, the coilor angle of the spring to be piyoted on a center at C, thereby causingthe hammer to be so raised and kept in position that it will allow thejack fly A to hare free play under the shoulder of hammer butt B, whenthe key is pressed down and the Various parts put in motion, thus beingat all times ready to repeat the blow of the hammer against the string.I also claim the application of the hook H in such manner to the hammerbutt B, as to drop down and hook to the fly or jack A by notch orotherwise thereby uniting the hammer butt B and jack iy A in such manneras to work t0- gether with more precision, causing the hammer to bebrought down to its place after the key has been struck and released.

I do not claim the general arrangement ot the action composed of theVarious parts as shown which is known as the French action and in commonuse.

That I claim as my inyention and deflre to secure by Letters Patentis` 1. The application of a spring to the hammer butt and jack fly,causing the hammer to be so raised and kept in position that it willallow the jack iy free play under the shoulder of the hammer but-t whenthe key is pressed down and the action in motion, as hereinaboyespeciied.

2. I also claim the application of the hook to the hammer butt and jackfly, as herein described, so as to cause them to work together with moreprecision and also to bring the hammer to its place after the key hasbeen struck and released.

JAMES A. GRAY.

litnesses R. J. NELSON, SIBERIA OTT.

